“Problems/bugsplats” for “some” people with V-Ray is known to happen. I don’t know how common it is though.
You are using SU16 according to your profile. SU16 has 32- and 64-bit versions. For some bugsplatting problems attributed to graphic drivers, users can uninstall the 64-bit version and install the 32-bit version because the required OpenGL functionality for the installed drivers running the 32-bit program version is better. People do not need to change anything with their 64-bit OS.
Before installing SU16 32-bit, try updating your graphic driver and contact V-Ray support to check if it is OK to install the 32-bit version of SU. V-Ray requires 64-bit, but that may just be the OS.
For your information, V-Ray is beta testing a new version that can be used with SU17. SU17 is only 64-bit.
SU17 introduced a new utility program called Checkup. It is a separate installation that will check your computer’s ability to run SU17. SU16 and SU17 have different requirements, but it may be nice to see if that utility finds any issues with your computer.